Malicious PDF — malware analysis report

Static analysis result for SHA-256 d54fd4505d8e0d84…

MALICIOUS

PDF

81.6 KB Created: 2021-03-30 23:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b7d82f022342317928138c9d6031dbb9 SHA-1: 5505d7f1063f9fff8cabfff3c9a56ed28d47effe SHA-256: d54fd4505d8e0d84bf9df6497ab864a4ff99a3ba55e51e198bf5bf9d510be94b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'dafemum.ru/award', suggesting a phishing or malware distribution lure. The document body, though heavily obfuscated, contains keywords related to PDF readers and awards, reinforcing the lure. No scripts were extracted, but the presence of external URIs and the overall detection profile indicate a malicious intent to redirect the user to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dafemum.ru/award?keyword=best+pdf+reader+ipad+apple+pencil
    • http://zelumefepa.sportsontheweb.net/clinical_chemistry_and_laboratory_medicine_books.pdf
    • https://cdn.sqhk.co/wodelaganav/gginnhe/redfin_portland_condos.pdf
    • http://loxesitigogu.iblogger.org/boy_scout_bugle_calls.pdf
    • http://idealica-itufficiale.website/i_am_who_god_says_i_am_sermonsbemy.pdf
    • https://cdn.sqhk.co/sebutarukaw/iegihaS/55413083224.pdf
    • http://fezibinuzot.iblogger.org/kanonuximumudopemulo.pdf
    • http://bettyloustintruckbbq.com/98249969898pnbe0.pdf
    • https://cdn.sqhk.co/besuduxikuvo/ifVhfge/22579897518.pdf
    • http://lulodexov.scienceontheweb.net/advanced_sql_server_interview_questions.pdf
    • https://cdn.sqhk.co/kogujipubap/bDjelWS/25360653891.pdf
    • http://choosemadam.site/a_level_english_literature_book1fgro.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8a80eca7-8492-42f3-8e3a-fa89d979f47e/similarities_between_distance_and_displacement_in_tabular_form.pdf
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_9de7c247e1a74ee6add33040a5b46d73.pdf?index=true
    • http://nazonuretowu.epizy.com/click_link_below.pdf
    • https://uploads.strikinglycdn.com/files/304b8f96-ac96-4b3a-8446-7a95a368ca5b/dell_e207wfp_driver_windows_7.pdf
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_fc5fa6e854904e3cbc6bfe147a1b7388.pdf?index=true
    • https://uploads.strikinglycdn.com/files/65b5106c-6944-40a6-891e-c3a7ac329ea7/god_is_not_one_stephen_prothero_free.pdf
    • https://uploads.strikinglycdn.com/files/04595ce4-59e8-498f-9475-2fdc3f9f5896/smart_weighing_scales_reviews.pdf
    • http://sebenakerutat.epizy.com/c_compiler_free_for_pc.pdf
    • https://6f84c080-6bd2-4154-8ce1-0e390380bda5.filesusr.com/ugd/defdb4_0d6e28d5ee154c4d91c06ab176978fd2.pdf?index=true
    • https://3c3713de-992c-4571-92b4-00afcb8cb2c1.filesusr.com/ugd/9dbdb2_9d65ab43d4e84ddc883ce4e31aa9b0c9.pdf?index=true
    • https://b81f28a7-a6cc-4df9-aebb-a76b708ee4b5.filesusr.com/ugd/df05b2_ff7d47610ffe45cea9176ecb24dbfcb8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/08cfd072-2d78-4c64-a3b2-f338388adee7/dr._wellness_x-3_spa_reviews.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff7a.bin
fdd053b884f505ed38420fb4b9b04f49b96edc6510d03d92278c411c816b06f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 5200 bytes
font_01_sfnt_off00011137.bin
26db5c5c00c6641c0909063df72aab67a35dd767cceb778e35f2a0a74ddfacc9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11137 11708 bytes

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